Mustang  Cobra Jet  and  Super Cobra Jet   Production

1968 1/2

428 CJ/SCJ

2,827

1969

428 CJ/SCJ

13,193

1970

428 CJ/SCJ

2,671

Total

428 CJ/SCJ

18,691

1971

429 CJ/SCJ

1,250

428  Cobra Jet  and  Super Cobra Jet  Engine   Specifications

Produced

1968 1/2 to 1970

Engine Family

FE big block

Size

4.130in x 3.984in (428 cid)

V/C Bolts

5

Intake

cast iron

Carburetor

Holley  735 cfm

Engine Code

"Q" non ram air,"R" ram air

Compression

10.6:1

Torque

1968   445@3400rpm

1969-70   440@3400rpm

Horsepower

1968   335@5600rpm

1969-70   335@5200rpm

429  Cobra Jet  and  Super Cobra Jet  Engine   Specifications

Produced

1970-71

Engine Family

385 series "Lima"

Size

4.360in x 3.590in (429 cid)

V/C Bolts

8

Intake

cast iron

Carburetor

Cobra Jet uses Roch. 715cfm

Super Cobra Jet uses Holley

780cfm

Engine Code

"C" non ram air,"J" ram air

Compression

11.3:1

Torque

450@3400rpm

both CJ and SCJ

Horsepower

375@5600rpm  SCJ

370@5400rpm  CJ